Beater bar



F. M. GLOYD Oct. 13, 1931.

HEATER BAR Filed Feb. 10, 1931 2 Sheets-Sheet l atented Oct-l3, 1931 juNiiEosTAT S P T OF FRANK MTGLOYD, or nAYroN oHIo, ASSIGNOR 'roslrxonnsWORDEN wnm r. ooMrAmr, or DAYTON, OHIO, A conronn'rlonor onxo Brier-En.BAR

Application filed Februarj10d1931. Serial No. 514,511.

This invention relates to engines for-beating paper stock inthemanufacture of paper,

and more particularly to improvements' -in the fly bars that arearranged on the periphery of the roll ofa beating engine.

lVhile my improvement is applicable to fly 7 bars of other designs Ishall describe it first in connection with corrugated fiy bars of thetype 7 shown in United States Patent No. 1,093,490. p I

The principal object of my invention is to increase the output'of abeating engine without any sacrifice of the quality of the output. Thisis accomplished by providing vent holes in the fly bars .0 preventpocketing air in the spaces between the bars. As the corrugated barshown in said Patent No. l,093,4.90, is a very fast bar, and as myimprovement is capable of greatly increasing the speed oi? this bar aswell as others,

desirable combination.

Another object of invention is to hydrate the stock adequately. Aseriou's'obf stacle to speedy beating of paper stock has always beeninsuflicient hydration of the stock, with consequent danger of injury tothe stockirom overbeating it. Y

'I shall now proceed to describerny'invention in detail with theassistance of the accompanying drawings, in which Fig. 1 depicts as muchof a'beating engine, or beater, as it is commonly called, as isnecessary in order that myinvention may be fully understood, said,figure'showing a portion of the tub, with one side removed to exhibitthe beating roll and parts associ ated with the roll, 1

' Fig. 2 shows a transverse section'on line 22ofFig.1; N V

Fig. 3' isaperspectiveview of a fragment of a corrugated fly barillustrating the application of my: improvement to such a bar; Fig. 4 isa transverse'sectional view of a cor- 4 rugated bar containing myimprovement, portions of the wooden spacing blocks, and the location ofthe retaining ring being'indicated with dotted lines;

Fig. 5 shows a 5 bar looking directly at its working edge,

the addition ofr'ny iniprovement to the corrugated bar effects a veryfragment: of a corrugated I p fill with stock. As the spaces pass overthe showing. the positions of my vent holes relative to thecorrugations;

:Fig. 6 shows a non corrugated beater bar embodying my invention, and 1a Fig. 7 isa transverse sectional view of the bar shown in Fig. 6.

' As Figs. 1 and 2 are to Figs. 1 and 2 of saidPatent So. 1,093,490, avery brief description of the older portions of the structure of saidpatent will suflice. The beater roll 10 is mounted to. rotate in the tub11 on a shaft 12, journaled in bearings 13-43, inthe usual way- Underthe roll 10 is the bed plate 14, and at one side of the roll is'thebaclrfall- 15 as usual. The .roll

comprises disks 161616, keyed or otherwise secured fly bars 17 aresecured with shrunken metal bands 18.. The. bars are additionallysecured 'in the roll with strips of wood 19, which, 5

being dry when placed in the roll, swell-when they become wet and securethe bars very tightly initheroll. Thespaces between the free" standingbars, indicated at 20-20, etc.,

referred to hereinafter as interbar? spaces,

are boundedon two'sides by bars and on their bot-toms by the woodenstrips or wedges 19.

in the main similar I to the shaft, on which disks the o The roll 10rotates in the direction indicated bythe arrows, and the approximatelevel of the stock in the tub 11 is indicated by dotted line extendinghorizontally from the right of the roll in Fig. 1. As'the interbarspaces plunge into the stock, air is trapped in the spaces. That'is, atthe speed at which the roll rotates there isnot sufficient time toallowthe air to'escape from the interbar spaces, when the air must escapepastthe incoming stock. Heretofore it has resulted that instead of filledwith stock as they passed over the bed gplate, the spaces contained moreor less air.

the interbarspaces being.

To correct this I provide a series of holes in each fiy bar at thebottom of the interbar spaces.

air in' thespace escapes through the holes or vents into the next higherspace, which next space is still above the level of the stock in thetub: in Fig. 2 the ventsareshown at 21-21.

As the stockrushes into a space the v etc. Thusthe interbar spaces areallowed to H v bed plate a local circulation is set up in each spacewhich brings about rapid change in the portions of the stock receivingtreatment, which not only greatly increases the results from aquantitative point of view but because of abundant hydration injury tothe stock is avoided, notwithstanding the speed with which it is beaten.

I have previously referred to the corrugated bar as very fast. This ispartly due to the increased. effective length of the bar resulting fromits sinuous or serpentine working edge. In other words, instead of theworking edge of the bar being only aslong as the body of the bar,itssinuous form makes the working edge considerably longer than the lengthof the bar, or evenof the roll. This sinuous form of working edge alsocauses most of the interaction between the fly bar and the bed platebars to be more or less oblique, which greatly accelerates the beatingaction. While this is inherent in the action of the corrugated bar, andis the invention of said Patent No. 1,093,490, it is pertinent to thepresent invention in that my vented fly bars, with the consequent wellfilled interbar spaces, employ to the fullest extent the possibilitiesof the corrugated bar.

Another advantage of combining my vents with the corrugated bar is thegreat strength of the latter. Notwithstanding I make the vents ofconsiderable size, even to the extent of making the sum of the lengthsof the vents approximate one-half of the length of the body of the bar,it is possible to retain the thin working edge, which is one of the mostdesirable characteristics of the corrugated bar, without weakening thebar appreciably. This will be better understood by referring to Figs. 3,4: and'5 where the construction of the corrugated bar is clearly shown,as I shall now explain.

The bar comprises two parts, a stock portion 22, which is the portionthat is clamped between the wooden strips 19, and the corrugated portion23. The stock portion is rat-her thick, especially at the part where thecorrugated portion joins it. The corrugated portion is much thinner, butthe change in the thickness is not so abrupt as to produce a weakness.On the contrary, the root of the corrugated portion is supported byfillets into which the corrugations merge, forming a very rigid supportfor the corrugated portion of the bar.

The location and relative size of the vents 21 are best shown in Figs.3, 4.- and 5. In Figs. 3 and 4 fragments of one of the bands 18 forsecuring the bars in the roll are shown with dotted lines, the bandlying in a notch 25 in each end of each bar. The wooden strips or wedgesare shown with dotted lines at 1919 (see Fig. 3). In these figures itwill be seen that the vents 21 are placed close to the strips 19. Itwill also be noticed that the vents are in the concavities betweencorrugations as seen from the forward face of the bar. By the forwardface is meant the face which leads as the bar moves with the roll, thedirection of movement of the bar being indicated with arrows in Figs. 3,1 and 5. It is not essential that the vents be placed in the concavitiesas shown, but it has the advantage of leaving intact the portions of thebar that are subjected to greater tensile strain when the bar is inoperation. In Fig. 5 the longitudinal dimension of the vents 21 is bestindicated, and it will be seen that the length of each vent is close tothe distance between vents.

The bar shown in Figs. 6 and 7 is of an old and well known form, butprovided with my vents 21 its effectiveness is very much increased.

Having described my invention and the preferred embodiment thereof, 1claim:

1. A beater bar traversed from front to rear by a series of holesadapted to serve as vents to prevent air being pocketed in spacesbetween adjacent bars in a beater roll equipped with such bars, saidholes being isolated from the working edge of the bar.

2. A beater bar traversed from front to rear by a series of holesadapted to serve as vents to spaces between adjacent bars in a beaterroll equipped with such bars, said holes being so situated that when thebars are mounted in a roll the holes will be at the bottom of theinterbar spaces.

8. A beater bar comprising a stock portion and a blade portion, thelatter portion being corrugated transversely, a series of 1 holestraversing the corrugated part of the bar from front to rear close toits juncture with the stock portion.

l. A beater bar comprising a stock portion and a blade portion, thelatter portion being corrugated transversely, a series of holestraversing the corrugated part of the bar from front to rear close toits juncture with the stock portion, said holes being in the concavitiesbetween corrugations as viewed from the forward face of the bar.

5. A beater bar comprising a portion adapted to be secured in a beaterroll, having the remainder projecting from the roll, said remaining partbeing corrugated transversely, the former part being uncorrugated, thecorrugated part being pierced by a series of holes close to its juncturewith the uncorrugated part. j

6. A beater bar one face of which is substantially flat, the oppositeface consisting of two planes, one inclining from each edge and meetingat a point intermediate its edges, said bar being pierced by a series ofholes in alignment with one edge of the bar but removed therefrom.

7. A beater bar traversed from front to prevent air becoming pocketed inlie rear by a series of holes adapted to serve as vents to prevent airbeing pocketed in spaces between adjacent bars in. a beater rollconnecting said inter-bar spaces to prevent pocketing air therein, thelength ofthe Working edges of said bars being no less than the length ofthe bars.

10. A beater roll comprising a series of beater bars radiatingfrom acylindrical body,

forming interbar spaces, and holes traversing said bars and connectingthe spaces on each side thereof, whereby to prevent pocketing air insaid spaces.

11. A beater roll comprising a series of beater bars radiating from abody, thereby forming interbar spaces, and holes traversing said barsand connecting interbar spaces on each side thereof, said holes beingnear the bottoms of interbar spaces, whereby to prevent pocketing air insaid spaces.

FRANK M. GLOYD.

CERTIFICATE or coRRecTIoN.

Patent No. 1,827,228. October 13, 1931.

FRANK M. GLOYD.

gr It is hereby certified that error appears in the printedspecification of the above numbered patent requiring correction asfoilows: Page 1, line 28, for "overheating" read "overheating"; and thatthe said Letters Patent should be read with this correction therein thatthe same may conform to the record of the case in the Patent Office.

Signed and sealed this 24th day of October, A. D. 1933.

F. M. Hopkins (Seal) Acting Commissioner of Patents.

